Photo source: Julian Robinson
While most owls limit themselves to prey up to 20% of their body weight, Powerful Owls go after many arboreal mammals such as possums, gliders, and juvenile koalas, which can be 50 to 100% of their body weight. That is about 10x the body weight to prey ratio of other owls.
If we look at it as a ratio as stated, it seems to work out.
Powerful Owls are about 3 pounds. If they can take down body weight prey, that’s 3 pounds.
A big barn owl, a common owl in most parts of the world, would be 1.4 pounds. Going by the average prey weight of 20% body weight, that’s 0.28 pounds.
3 / 0.28 = 10.7